Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculation...Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculations,NdF4- was identified as the most likely Nd-F entity in the melts in which the mole fraction of NdF3 was lower than 20%,considering only one single Nd species in the melt,and which was formed in accordance with Temkin model or Flood model.Then,activities of different components in the melts were researched.The results show that activity of LiF decreases,and that of NdF3 increases with increasing the mole fraction of NdF3.The value of activity coefficient of NdF3 is higher than 1,and that of LiF is lower than 1.展开更多
We describe how to develop a suite of models in the MS4 Modeling Environment(MS4 Me).The approach employs the operation of merging of System Entity Structures supported by the environment.After construction,the suite ...We describe how to develop a suite of models in the MS4 Modeling Environment(MS4 Me).The approach employs the operation of merging of System Entity Structures supported by the environment.After construction,the suite of models can be hosted on Model Store,the cloud-based repository of models provided by MS4 systems as a basis for further collaborative model development.A suite of models,relating to Health Care is used as an example.In this paper,we review basic concepts of the SES needed to support of suites of simulation models.We then consider the concept of multiple aspects that provides more advanced capabilities to construct and manipulate suites of models.With this background,we go on to discuss a methodology for developing suites of simulation models and cloud-based technology for storing and sharing such models in a marketplace of models.Finally,we discuss future research and developments needed to bring the marketplace into common use by modeling and simulation practitioners.展开更多
基金Project(51004034)supported by the National Natural Science Foundation of ChinaProject(N090302009)supported by the Fundamental Research Funds for the Central Universities,China
文摘Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculations,NdF4- was identified as the most likely Nd-F entity in the melts in which the mole fraction of NdF3 was lower than 20%,considering only one single Nd species in the melt,and which was formed in accordance with Temkin model or Flood model.Then,activities of different components in the melts were researched.The results show that activity of LiF decreases,and that of NdF3 increases with increasing the mole fraction of NdF3.The value of activity coefficient of NdF3 is higher than 1,and that of LiF is lower than 1.
文摘We describe how to develop a suite of models in the MS4 Modeling Environment(MS4 Me).The approach employs the operation of merging of System Entity Structures supported by the environment.After construction,the suite of models can be hosted on Model Store,the cloud-based repository of models provided by MS4 systems as a basis for further collaborative model development.A suite of models,relating to Health Care is used as an example.In this paper,we review basic concepts of the SES needed to support of suites of simulation models.We then consider the concept of multiple aspects that provides more advanced capabilities to construct and manipulate suites of models.With this background,we go on to discuss a methodology for developing suites of simulation models and cloud-based technology for storing and sharing such models in a marketplace of models.Finally,we discuss future research and developments needed to bring the marketplace into common use by modeling and simulation practitioners.
